Hi People, Ok Im going to Buy a iPhone 4 on my Bro's Account and swap sim cards but since the iPhone 4 uses a Micro Sim card I guess its not going to work on the OLD phone unless I buy the "Micro SIM to Normal SIM adapter". -Can I just re-activate the old Big normal Sim Card so he can continue to use it? Or do I need to also buy a new Big SIM!? And I was told that I could Cut my current (big SIM) to use it on the iPhone 4, but that i can also ask AT&T to give me a SIM Card and then I activate it. How do I activate the New Sim Card? Were do I Call or can I do it online?